Guy PujolleProduct Form in Discrete-Time Queueing Networks: New Issues.148-1531995conf/mascots/1995MASCOTSdb/conf/mascots/mascots1995.html#Pujolle95http://dx.doi.org/10.1109/MASCOT.1995.378695http://doi.ieeecomputersociety.org/10.1109/MASCOT.1995.378695